20320231232 has 112 divisors (see below), whose sum is σ = 46586119680. Its totient is φ = 8614244352.

The previous prime is 20320231219. The next prime is 20320231237. The reversal of 20320231232 is 23213202302.

It is a tau number, because it is divible by the number of its divisors (112).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20320231237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18522908 + ... + 18524004.

Almost surely, 2^20320231232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20320231232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23293059840).

20320231232 is an abundant number, since it is smaller than the sum of its proper divisors (26265888448).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20320231232 is a wasteful number, since it uses less digits than its factorization.

20320231232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1528 (or 1518 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 20320231232 its reverse (23213202302), we get a palindrome (43533433534).

The spelling of 20320231232 in words is "twenty billion, three hundred twenty million, two hundred thirty-one thousand, two hundred thirty-two".